Xinjector



(Model.)

. H. B. MURDOGK.

H INJBGTOR. No. 331,154.. Patented Nov. 24, 1885.

l! Il uw Witnesses: Inventor:

Urtrrnn Freins HORACE B. MURDOOK, OF DETROIT, MICHIGAN.

JNJECTOR.

SPECIFICATION forming part @I Letters Patent Dilo. 331,154-, dated November 24, 31.885. Application iiled October' 18, 1884. Serial No, 145,956. (Model.)

To all whom, it 'may concerm' Beit known that I, HORACE B. MUnDocK, of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Injectors, of which the following is a specification.

Figure l isa longitudinal section. Fig. 2 is a perspective of the steam-jet passage, and Fig. 3 is a perspective o f the delivery-tube; and Fig. 4 is a detail of part of the case, showing the lug which prevents the nut A from turning.

My invention consists in certain iinprovements in the construction of injectors, here` inafter fully pointed out in the claims.

rEhe shelloi'- the injector' is cast in one piece, and on itlare cast the projecting pipes R, which is the steam-entrance; S, which is the water-entrance; T, which is the water-delivery pipe on the way to the boiler, and I which is the overiiow-pipe, connected to one or more projections, Q Q', in which are situated the overilow check-valves. Vith the case are cast partitions Y, W, V, and WW, which separate the interior of the case into steam, overliow, and discharge chambers.

D represents the steam-plug, beveled at its inner end, as shown in the drawings, and provided at its outer end with a hand-wheel, V, by which it can be turned. Plug P is perforated longitudinally from its inner end to a point opposite the steam-nipple R, and at this point one or more holes, C, are bored transversely in the plug, meeting the longitudinal bore. From a point a little back of the holes C plug D is somewhat reduced in diameter its whole length, and has a screwthread cut thereon, as shown in Fig. l.

A represents a screw-thread adapted to screw 0n the thread on plug D, and having on each side thereof a section, B, cut out to expose the holes C. Nut A is made cylindrical, except for the cut-away sections B, from its outer end to the point a, where it is reduced in size, as shown in Fig. 2, for the remainder of its length. This construction permits a lug, 2, Fig. 4, cast on the inner surface of the shell, to engage with the side a of the cut-away portion of the nut A, so that said nut cannot turn when plug D is turned.

Z represents a stuffing-box on the end of the case, through which plug D passes.

taper forni through the partition YV in they shell, and in line with plug D. Vhen plug D is screwed into the shell, its beveled `end enters the iiaring end of the combining-tube and prevents all liow of water to said tube, and by withdrawing plug D from tube G the size of the water-way-around the end of the plug into the tube can be regl'ilated to exactly correspond with the steam-pressure and thel capacity of the injector. Y

NV" and W2 represent two partitions cast in the shell, and having perforations therethrough, in which the delivery-tube G is supported, so that a longitudinal perforation, S, therethrough is in line with coinbiningtube G, though an open space, for overiiow or relief, is left between said tubes. The deliverytube G is so constructed as to iit snugly in the perforations through partitions W VZ, and a shoulder, L, thereon bears against partition W2, and is clamped between said partition` and the inner end of a screw-cap, I, which screws into and closes the end of the case, so that the delivery-tube is held firmly in position. In that part of the delivery-tube which lies between partitions IV NVZ, I bore one or niore transverse holes, H, connecting with bore S, to relieve the bore, which is made flaring, as shown in Fig. l, from a surplus of' water, and in that part of said delivery-tube which lies between partitions WV NV', I cut a slot, K, into the bore, and bevel off the side thereof nearer partition WV for like purposes of relief.

The end of the delivery-tube which lies within the screw-cap I is inade of two arrns, M/ M, joined at the outer end by a perforated disk, N, and in the inner end of the screw-cap are several holes, J, so that water which comes through the delivery-tube passes freely into ICO v'the interior of screw-cap I and through holes f any convenient point therein.

This construction renders vthe operation of putting together and` taking apart the injector very simple, for by unscrewing the stuffing-box Z the nut A and plug D can be taken out, and by unscrewing the cap I the delivery-tube can be removed. The checkvalves q q can also be removed by unscrewing the caps which close the projections Q Q.

In the operation of my injector the distance of the end of plug D from lthe mouth of the combining-tube G is regulated to suit the steam-pressure and the capacity of the injector by turning the hand-Wheel V, and thus causing the plug to travel in nut A. When this regulation has been once made, the plug D need not be further disturbed, and the injector is operated entirely by opening or closing a valve in the steam-pipe R.

The mode of operation is so well known that no description of it is necessary.

WhatI claim as my invention, and desire to secure by Letters Patent, is-

l. In an injector, a delivery-tube adapted to be inserted through an opening in the end of a case made in one piece, and supported by one or more partitions cast in said case, in combination with a screw-cap adapted to close the opening in said case and clamp said delivery-tube rigidly in position, substantially as shown and described.

2. In an injector, the combination of the plug D, packing-rings E F, nut A, and stuft ing-box Z, substantially as shown and described.

3. In combination with the plug D, having one end longitudinally perforated, and also having therein one or more transverse passages, C, the nut A, having the sections B cut therefrom, substantially as shown and described.

4. In an injector having its case made in one piece, and having steam, Water, overiiow, and discharge chambers formed therein by partitions cast integral therewith, a combiningtube formed in the partition which separates the water and overflow chambers, a plug adapted to close the mouth of said combining tube, and having therein a longitudinal bore connected with the steam-chamber, supported by a stuffing-box, which closes one end of the case, and a delivery-tube connecting the overflow-chamber with the discharge-chamber, and held in place by a screw cap, which closes the other end of said case, substantially as shown and described.

5. The combination of the deliverytube having thereon shoulder Ii, perforated partition XV, and screw-cap I, having therein one v or more holes, J, substantially as shown vand described.

HORACE B. MURDOCK. Witnesses:

JOHN TRIX,

Sui/[NER GoLLINs. 

